Project Properties – Effects
Effects page, has three sections:
Box
Boxed subtitles appearance is controlled from here. The following parameters can be specified:
Left, Right, Top and Bottom extends - how many pixels the box will be expanded with in corresponding direction. For PAL/NTSC resolution the defaults are left: 18 pixels, right: 18 pixels, top and bottom are 0 pixels.
Color option specifies the color of the box. The default color is black.
Opacity option is applied for Ghost boxed, Ghost striped and Ghost block-boxed subtitles. Larger values make the box less transparent. The default is '35%'.
More information about subtitles presentation styles is available HERE.
Outline and Shadow
When enabled, an outline (or border) will be drawn around the characters with width and color specified by you. Width values range from 0 to 8 (default is 2) even though reasonable values are from 1 to 3. However, you can try other values as well to find the one that better suit your needs depending on the current font and size.
When enabled, drop-shadow will draw a shadow of the characters in a selected color and defined offset relative to the original character's position. Both X Offset and Y Offset settings accept values from -8 to 8. Changing shadow's Opacity or enabling the Soft shadow option may result into more pleasantly looking results.
Easy way to disable the drop-shadow effect is by entering zero pixels in both fields or by changing its opacity to 0%.
Negative Y Offset values mean the shadow will be drawn above the original character's position. Giving positive Y Offset values will draw a shadow below the original position.
X Offset acts similarly, where negative values will set the shadow before and positive will set the shadow after the original character's position. You can combine negative and positive values for the X and Y Offsets to achieve the desired results.
More information about subtitles presentation styles is available HERE.
Text/Anti-aliasing
The text color is the color of the normal text.
When the Anti-aliasing option is turned on, an anti-aliasing algorithm is applied to the drawn text, which smooths the edges of the characters.